Canonicalize stuhood@gmail.com -> Stu Hood.
Canonicalize stuhood@gmail.com -> Stu Hood.

Testing Done:
Before:
```console
 $ ./build-support/bin/contributors.sh -s release_0.0.33
     15 Eric Ayers
     10 John Sirois
      9 Benjy Weinberger
      7 Stu Hood
      5 stuhood
      4 Sara Solano
      3 Cody Gibb
      2 Sergey Serebryakov
      2 Nick Howard
      1 Tejal Desai
      1 Qicheng Ma
      1 Larry Hosken
      1 Kris Wilson
      1 Garrett Malmquist
      1 Fedor Korotkov
      1 Andy Reitz
```

After:
```console
$ ./build-support/bin/contributors.sh -s release_0.0.33
     15 Eric Ayers
     12 Stu Hood
     10 John Sirois
      9 Benjy Weinberger
      4 Sara Solano
      3 Cody Gibb
      2 Sergey Serebryakov
      2 Nick Howard
      1 Tejal Desai
      1 Qicheng Ma
      1 Larry Hosken
      1 Kris Wilson
      1 Garrett Malmquist
      1 Fedor Korotkov
      1 Andy Reitz
```

CI went green here:
  https://travis-ci.org/pantsbuild/pants/builds/69820697

Bugs closed: 1760

Reviewed at https://rbcommons.com/s/twitter/r/2437/

landism/pants,UnrememberMe/pants,megaserg/pants,15Dkatz/pants,ericzundel/pants,digwanderlust/pants,jessrosenfield/pants,sameerparekh/pants,benjyw/pants,pombredanne/pants,wisechengyi/pants,megaserg/pants,lahosken/pants,tdyas/pants,peiyuwang/pants,baroquebobcat/pants,dturner-tw/pants,15Dkatz/pants,slyphon/pants,sameerparekh/pants,pombredanne/pants,qma/pants,TansyArron/pants,jessrosenfield/pants,baroquebobcat/pants,ericzundel/pants,megaserg/pants,ity/pants,baroquebobcat/pants,megaserg/pants,ericzundel/pants,pantsbuild/pants,landism/pants,areitz/pants,foursquare/pants,sameerparekh/pants,kslundberg/pants,UnrememberMe/pants,pombredanne/pants,UnrememberMe/pants,manasapte/pants,jessrosenfield/pants,di0spyr0s/pants,ity/pants,tdyas/pants,tdyas/pants,jtrobec/pants,pantsbuild/pants,qma/pants,kslundberg/pants,digwanderlust/pants,digwanderlust/pants,15Dkatz/pants,laurentgo/pants,dbentley/pants,scode/pants,slyphon/pants,TansyArron/pants,UnrememberMe/pants,twitter/pants,gmalmquist/pants,foursquare/pants,mateor/pants,jtrobec/pants,UnrememberMe/pants,dbentley/pants,jtrobec/pants,areitz/pants,areitz/pants,ericzundel/pants,fkorotkov/pants,twitter/pants,pombredanne/pants,twitter/pants,peiyuwang/pants,tdyas/pants,tdyas/pants,ity/pants,fkorotkov/pants,jessrosenfield/pants,jsirois/pants,mateor/pants,dbentley/pants,scode/pants,TansyArron/pants,sid-kap/pants,TansyArron/pants,foursquare/pants,pantsbuild/pants,sid-kap/pants,twitter/pants,di0spyr0s/pants,cevaris/pants,baroquebobcat/pants,dturner-tw/pants,kwlzn/pants,benjyw/pants,manasapte/pants,jtrobec/pants,manasapte/pants,15Dkatz/pants,jsirois/pants,Gabriel439/pants,qma/pants,lahosken/pants,qma/pants,laurentgo/pants,landism/pants,fkorotkov/pants,lahosken/pants,scode/pants,lahosken/pants,ity/pants,dbentley/pants,cevaris/pants,kslundberg/pants,laurentgo/pants,lahosken/pants,pombredanne/pants,pantsbuild/pants,scode/pants,landism/pants,areitz/pants,jessrosenfield/pants,15Dkatz/pants,sid-kap/pants,tdyas/pants,UnrememberMe/pants,mateor/pants,Gabriel439/pants,slyphon/pants,qma/pants,baroquebobcat/pants,benjyw/pants,jsirois/pants,foursquare/pants,twitter/pants,Gabriel439/pants,15Dkatz/pants,laurentgo/pants,kwlzn/pants,sameerparekh/pants,di0spyr0s/pants,digwanderlust/pants,lahosken/pants,pantsbuild/pants,qma/pants,UnrememberMe/pants,areitz/pants,Gabriel439/pants,dbentley/pants,jessrosenfield/pants,scode/pants,pantsbuild/pants,baroquebobcat/pants,kwlzn/pants,mateor/pants,jessrosenfield/pants,mateor/pants,peiyuwang/pants,foursquare/pants,kslundberg/pants,slyphon/pants,twitter/pants,qma/pants,di0spyr0s/pants,ericzundel/pants,areitz/pants,foursquare/pants,scode/pants,scode/pants,gmalmquist/pants,benjyw/pants,cevaris/pants,laurentgo/pants,Gabriel439/pants,cevaris/pants,peiyuwang/pants,tdyas/pants,fkorotkov/pants,benjyw/pants,ity/pants,megaserg/pants,megaserg/pants,tdyas/pants,gmalmquist/pants,twitter/pants,gmalmquist/pants,wisechengyi/pants,jtrobec/pants,gmalmquist/pants,baroquebobcat/pants,kslundberg/pants,baroquebobcat/pants,UnrememberMe/pants,peiyuwang/pants,lahosken/pants,ericzundel/pants,jtrobec/pants,areitz/pants,jtrobec/pants,dturner-tw/pants,laurentgo/pants,Gabriel439/pants,peiyuwang/pants,manasapte/pants,di0spyr0s/pants,manasapte/pants,landism/pants,TansyArron/pants,pombredanne/pants,sameerparekh/pants,sid-kap/pants,UnrememberMe/pants,wisechengyi/pants,lahosken/pants,dbentley/pants,di0spyr0s/pants,megaserg/pants,dturner-tw/pants,mateor/pants,slyphon/pants,mateor/pants,manasapte/pants,sid-kap/pants,foursquare/pants,foursquare/pants,sid-kap/pants,peiyuwang/pants,dbentley/pants,slyphon/pants,wisechengyi/pants,ity/pants,cevaris/pants,cevaris/pants,kwlzn/pants,kwlzn/pants,landism/pants,dturner-tw/pants,foursquare/pants,benjyw/pants,fkorotkov/pants,landism/pants,benjyw/pants,digwanderlust/pants,15Dkatz/pants,ity/pants,gmalmquist/pants,fkorotkov/pants,dturner-tw/pants,landism/pants,di0spyr0s/pants,pantsbuild/pants,dturner-tw/pants,Gabriel439/pants,baroquebobcat/pants,ericzundel/pants,fkorotkov/pants,wisechengyi/pants,manasapte/pants,wisechengyi/pants,kslundberg/pants,fkorotkov/pants,15Dkatz/pants,twitter/pants,sid-kap/pants,TansyArron/pants,slyphon/pants,twitter/pants,sameerparekh/pants,gmalmquist/pants,kwlzn/pants,TansyArron/pants,wisechengyi/pants,pombredanne/pants,digwanderlust/pants,tdyas/pants,cevaris/pants,sameerparekh/pants,wisechengyi/pants,kslundberg/pants,ericzundel/pants,mateor/pants,wisechengyi/pants,kwlzn/pants,peiyuwang/pants